I'm not sure a straight platoon is in order, because I wouldn't want to mess with Davis too much (who actually has been quite solid), and since Parra is having a down season at the moment, but I did some cocktail napkin math: Parra career v. RHP = .286/.335/.425/.760, .327 wOBA [+11.0 UZR/150 in LF] Davis career v. LHP = .294/.345/.632/.977, .418 wOBA [-2.5 UZR/150 in LF] If we assume 1/3 of PA against LHP, 2/3 against RHP, and just applying those weights to the above numbers (like I said, far too simplistic most likely), you get a combined line of: .288/.339/.494/.833, .357 wOBA [+6.5 UZR/150 in LF] Closest full-season stat line I could find to that was Alex Gordon in 2012, when he had a .357 wOBA and +7.3 UZR for a season fWAR of 5.6